High pressure pump



1959 R. E. RAUDABAUGH 2,897,766

HIGH PRESSURE PUMP Filed Oct. 22, 1956 INVENTOR. Rgyfi'fi'audabau 72 an W HIGH PRESSURE PUMP Roy E Raudabaugh, Scott, Ohio Application October 22, 1956, Serial No. 617,305 3 Claims. (Cl. 103-136) This invention relates to pumps.

It is an object of the present invention to provide a pump which will work as a high pressure pump and as a hydraulic pump, being self-priming.

It is another object of the present invention to provide a pump of the above type which works similar to a piston pump, although there are no valves required and wherein the pump turns at a low speed and produces high pressure.

It is still another object of the present invention to provide a pump of the above type which has more uplift than conventional pumps, is of simple construction and requires fewer parts than other high pressure pumps.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which:

Figure 1 is a vertical sectional view shown partly in elevation of a preferred embodiment of the present invention;

Fig. 2 is an end elevational view thereof; and

Fig. 3 is a longitudinal sectional view thereof shown partly in elevation.

Referring now more in detail to the drawing, represents a hollow cylindrical casing integrally formed with a solid rectangular base portion 11 which is suitably mounted on the supporting surface 12, substantially as illustrated.

As shown in Fig. 1, the smooth cylindrical interior of the casing 10 extends at the inlet side 35 into the interior bottom surface 43 of the base 11, as at 13 where it is interrupted by the integrally formed abutment 44 having a vertical wall 14 and a downwardly and outwardly inclined upper cam surface 15, said surface 15 having an inner end 40 and an outer end 41, said outer end 41 joining with the interior wall on the outlet side 36 of the housing, the vertical wall portion 14 and cam surface 15 thereof defining a sharp inner edge 42 extending the entire length of the housing 10.

A pair of circular bearing plates 16 and 17 are suitably secured to the ends of the housing 10 and are provided on their inner faces with the cylindrical recesses 18 and 19 respectively which rotatably mount therewithin the opposite ends of the cylindrical shaft member 20. The opposite ends of the shaft 20 are integrally formed with the reduced extensions 21 and 22 which are rotatably mounted in suitable bores provided in the bearing plates 16 and 17, the extension 21 extending outwardly beyond the bearing plate 16 and fixedly mounting thereon a pulley 23 by means of the integral hub portion 24 and the pin 25. The pulley 23 is driven by the belt 26 suitably connected to a source of power, for example an electrical motor.

The shaft 20 is provided with a transverse rectangular slot 27 which extends inwardly through one side and terminates just short of the opposite side (Fig. l), the slot 27 extending longitudinally the entire length of the interior of the housing 10 and slidably receiving therewith- 2,897,766 Patented Aug. 4, 1959 6 in a rectangular piston plate 28, the outer longitudinal edge of which is slightly curved and is adapted to ride the curved interior cylindrical surface of housing it Springs 29 are positioned between the inner end of the slot 27 and the inner edge of the piston plate 28 and serve to normally retain the same outwardly.

An intake conduit 30 is screw threaded upwardly through the base 11 and communicates with the interior of the housing 10 adjacent the stepped portion 14 (Fig. -1). An outlet conduit 31 is screw threaded upwardly through the base 11 below the stepped portion 14 and communicates with the outlet opening 32 provided therein which extends upwardly through the cam surface 15 adjacent the shaft 20.

It will be noted that the inner edge 42 of the cam surface 15 is in contact with the shaft 26 which forces the liquid being pumped through the outlet opening 32 upon counter-clockwise movement of the piston plate 28. As the plate 28 contacts the cam surface 15, it will be drawn into the slot 27, being completely contained therein against the action of spring 27 as it comes to the inner edge of the cam surface 15. This retraction of the piston plate 28 will create a reduced pressure within the housing 10 which will draw the liquid upwardly through the intake conduit 30. Centrifugal force will retain the piston plate '28 in the outer position until it reaches the cam surface. As the shaft turns the piston plate 23 will force the liquid ahead of it and out of the outlet opening 32 through the outlet conduit 31. There will be a steady pressure from the pump except when the piston plate 28 passes over the cam surface 15 and into the shaft 20.

The pump will be used for pumping water and oil as well as other liquids.

It will be apparent that the pump will work as a high pressure pump and as a hydraulic pump, and is selfpriming. The pump works similar to a piston pump, but the valves usually associated therewith are eliminated. The pump will turn at a relatively low speed and produce high pressure and will provide more uplift than conventional pumps. It will be noted that it effects a simplicity of design and requires fewer parts than conventional high pressure pumps.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

What I claim as new and desire to protect by Letters Patent of the United States is:

1. A high pressure pump comprising, in combination,

a closed hollow substantially cylindrical casing having an inlet side and an outlet side and formed with a solid rectangular base portion for supporting the same, a substantially solid cylindrical rotatable shaft member, a pair of circular bearing plates rotatably mounting said rotatable shaft member at opposite ends thereof, said plates forming the ends of said casing, pulley means connected externally from one end of said rotatable shaft member for driving the same, an abutment at the bottom of said casing on the interior thereof embodying a vertical wall and having an outwardly and downwardly extending cam surface which joins at its outer end to the interior wall of said outlet side of said casing, the outer end of said cam surface and the interior wall of said casing defining a smooth surface, the inner end of said cam surface defining a sharp inner edge with said vertical wall and extending the entire length of the casing, said sharp inner edge of said cam surface being in slidable contact with said rotatable shaft member, said abutment having an outlet opening adjacent to the vertical wall thereof extending downwardly therethrough with an outlet conduit connected thereto, an inlet conduit communicating with the interior of said casing on the inlet side thereof and located adjacent to the vertical wall of said abutment, said rotatable shaft member having a transverse rectangular slot extending through one longitudinal side thereof and terminating short of the opposite side thereof, said slot extending the entire length of said casing, a rectangular piston plate slidably" rnounted within saidrectangular slot for lateral movement therewithiii, spring means carried within said slot by said rotatable shaft member for urging said piston plate outwardly against the curved interior surface of said casing, the outer longitudinal edge of said piston plate being curved so as to ride the curved interior surface of saidcasing and to move the fluid thereahead as said rotatable member rotates to force the .fluid outwardly through said outlet opening and outlet'conduit and tobe entirely retracted within said slot at said inner edge asit rides said cam surface to create a reduced pressure and to draw the fluid inwardly through said intake conduit.

References'Cited in thefile of this patent UNITED STATES PATENTS 949,219 Clement et al. Feb. 15, 1910 2,294,647 Ames Sept. 1, 1942 FOREIGN PATENTS 281,757 Italy Jan. 22, 1931 

